Selective dissolution to synthesize densely populated Pt single atom catalyst  

作　　者：Weinan Yang Xiaoguang Zhao Ya Wang Rong Wang Wenhao Yang Yue Peng Junhua Li 

机构地区：[1]State Key Joint Laboratory of Environment Simulation and Pollution Control,School of Environment,Tsinghua University,Beijing 100084,China [2]Sinopec Research Institute of Petroleum Processing,Beijing 100083,China

出　　处：《Nano Research》2023年第1期219-227,共9页纳米研究（英文版）

基　　金：This work was supported by the National Natural Science Foundation of China(No.21936005);the Natural Science Foundation of Beijing(No.8202028);China Petrochemical Corporation Funding(Sinopec Group,No.321094).

摘　　要：Single atom catalysts(SACs)have become one of research focuses in heterogeneous catalysis for their effective utilization of active metal atoms and unique properties in various catalytic reactions.However,due to their high surface energy,noble metal single atoms like Pt tend to migrate and agglomerate to form larger clusters or nanoparticles,which makes it a challenge to fabricate noble metal SACs with high loading(>5 wt.%).Furthermore,the decisive factors of loading maximum are still not clear.Here,we reported a manganese oxide supported Pt SAC with a high loading of 5.6 wt.%synthesized by selective dissolution strategy.The pre-stabilization of Pt by coordinated oxygen and the abundant surface defects of support are the determinants of high loading.The Pt SAC exhibited much better H_(2)spill-over and hydrocarbon oxidation abilities with lower adsorption and dissociation energies than the manganese oxide support because of its local electronic structure with less repulsion.

关 键 词：manganese oxide selective dissolution single-atom catalysis hydrogen spill-over propene oxidation 

分 类 号：O64[理学—物理化学]